About half the height and 10% wider than standard nylon-insert locknuts, use these in low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Comparable in strength to Grade 8 bolts, these locknuts are about three times stronger than low-strength steel extra-wide thin locknuts.

Steel locknuts without a finish are ready to be welded, painted and finished.

Black-phosphate steel locknuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

These locknuts are about half the height and 10% wider than standard nylon-insert locknuts. Use them in light duty low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.

Zinc-plated steel locknuts provide mild corrosion resistance in wet environments.

Black corrosion-resistant-coated steel locknuts are more corrosion resistant than zinc-plated locknuts in wet environments. They’re also known as black luster locknuts.

For technical drawings and 3-D models, click on a part number.

These locknuts have good chemical resistance and may be mildly magnetic. About half the height and 10% wider than standard nylon-insert locknuts, use them in low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.

For technical drawings and 3-D models, click on a part number.